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(No Model.)

J. A. EDWARDS.

CHARCOAL OVEN. v No. 307,928. Patented Nov. 11, 1884.

k PETERS. MQ-htingmphen Washinghm. o. c

NITED STATES PATENT OFFICE.

JOHN A. EDWARDS, or ooLUMBIANA, ALABAMA.

CHARCOAL-OVEN.

SPECIFICATION forming part of Letters Patent No. 307,928, dated November11, 1884.

Application filed June 27. 1884.

To all whom it may concern.-

Be it known that 1, JOHN A. EDWARDS, of Columbiana, in the county ofShelby and State of Alabama, have invented a new and useful Improvementin Charcoal-Ovens; and I do hereby declare that the followingisa full,clear, and exact description of the same.

My invention relates to charcoal-ovens, and is an improvement upon theform 'shownin Letters Patent of the United States granted to me, No.292,635.

The details of construction are hereinafter described and claimed. Theyare shown in the accompanying drawings, in which Figure l is a sideelevation of the oven. Fig. 2is a slightly-modified form of the same.Fig. 3 is a central vertical section of Fig. 1.

The oven is made of thin sheets ofmetal riveted together on horizontaland vertical lines, and the joints are so made that the lower edge ofeach sheet above the first course overlaps, on the outside, the upperedge of the sheet or course next below it.

In the drawings, a represents thelower sheet or course of sheets.

1) represents the sheet or course of sheets next above it, and the loweredge of the sheet I) is lapped on the outside of the sheet a. This givesthe ordinary advantage of shedding water; but the principal object isthat the pitch or rosin melted from the wood inside runs down thesurface, filling the joints, thus rendering them air-tight. I providearound the lower edge a row or rows of ventilating-holes of triangularshape with the apex at the top, and covered with corresponding doors,this (No model.)

being the best mode of putting in doors and allowing the joints to .becemented when the air is shut off by plastering the three sides. Whenthe oven is intended to be used as a stationary oven, I provide one ormore doors, B, in its walls at or near the base, for the purpose ofintroducing the wood or removing the charcoal. I also provide adamper-door, O, at the top.

In order to admit the air underneath the wood, I dig holes in the earthunder the edge of the oven, as shown at (2. These holes may be dug in asfar as necessary to communicate the air freely to the wood. This makesshorter brands and economizes the material, and the holes may be readilyplugged with earth when it is necessary to shut oh the draft.

I prefer to rivet the sheets of metal together, instead of fasteningthem by bolts and nuts, as the rivets can be cut whenever it may benecessary to take the oven apart for the purpose of removing it.

I claim as my invention A charcoal-furnace composed of sheets of metal,the sheets of the upper course being lapped outside the edges of thelower, whereby the joint is made automatically air-tight in use,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN A EDWARDS.

\Vitnesses:

DUGALD R. MoMILLAN, SHELBY XV. NELSON.

